"I am pleased that the President signed this bill to rename the Crenshaw Post Office in honor of a person who dedicated his life to public service," Watson said in a statement. "The Tom Bradley Post Office will serve as a testament to his unprecedented years of dedication to the city of Los Angeles."

Elected in 1973, Bradley served an unprecedented 20 years as mayor. The grandson of slaves and the son of sharecroppers, he grew up in Los Angeles, breaking color barriers and was the first African American elected to the City Council and the first elected mayor. He died in September 1998 at age 80.